Features; System Diagnostics; Motor Soft-Start; Over-Temperature Foldback - Franklin Electric SubDrive Solar Manuel D'installation

Features

System Diagnostics

The SubDrive Solar controller continuously monitors system performance and can detect a variety
of abnormal conditions. In many cases, the controller will compensate as needed to maintain
continuous system operation; however, if there is high risk of equipment damage, the controller
will protect the system and display the fault condition. If possible, the controller will try to restart
itself when the fault condition subsides. See Troubleshooting section for a list of Fault Codes and
corrective actions.

Motor Soft-Start

Normally, when there is a demand for water and power is available, the SubDrive Solar will be
operating. Whenever the SubDrive Solar detects a need for water, the controller always "ramps
up" the motor speed through a gradual increase of motor voltage, resulting in a cooler motor and
lower start-up current compared to conventional water systems. In cases where the demand for
water is low, the system may cycle on and off. Due to the controller's soft-start feature this will not
harm the motor.

Over-Temperature Foldback

The SubDrive Solar controller is designed for full power operation from a DC solar array in ambient
temperatures up to 122 °F (50 °C). Under extreme thermal conditions, the controller will reduce
output power in an attempt to avoid shutdown. Full pump output is restored when the controller
temperature cools to a safe level.
Pressure or Level Control Switch
A pressure or level control switch can be wired into the SubDrive Solar controller for water level
or pressure control. This is optional and is not required to run the SubDrive Solar controller.
The controller can be used with none, one, or two control switches. This provides the user
maximum adjustability when using the SubDrive Solar controller. See installation section for more
information on installing and using control switches.
Automatically Switching to Back-up AC Power
The SubDrive Solar controller includes a secondary input power terminal that may be used
with a back-up 230 V AC power source. If there is sufficient voltage measured from the primary
source (Solar Array), the drive will attempt to draw from it to run the pump. The controller will
automatically switch to the alternate back-up supply input if:
1. The PV (Photovoltaic) Solar Array input cannot provide sufficient Vdc after a number
of attempts to successfully start the motor; AND
2. Generator back-up power is available at the AC back-up terminals.
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